Setting the Input Mode Switch on a Three-Input 240-A DC Power Supply for a T640 Router

Note: Do not set the input mode switch if the power supply is installed in the chassis. If the power supply is already installed, you must disconnect all cables and remove the power supply before setting the input mode switch.

1. Using a screwdriver, loosen the captive screw holding the metal cover over the input mode switch (see Figure 1).
2. Rotate the metal cover away from the input mode switch to expose the switch.
3. Check the setting of the input mode switch. Use a flashlight, if necessary. In 2-INPUT mode, the switch must be located all the way to the right.
4. If the input mode switch is not set correctly, use a sharp, nonconductive object to slide the switch all the way to the right to set the power supply to 2-INPUT.

   Caution: Do not use a pencil, because fragments can break off and cause damage to the power supply.

5. Rotate the metal cover over the input mode switch, and use a screwdriver to tighten the captive screw.

Figure 1: Three-Input 240-A DC Power Supply